Allen-Bradley 440K-M22AEYT Safety Interlock Switch

Allen-Bradley 440K-M22AEYT is a Guardmaster MT-GD2 tongue-interlock switch designed for safeguarding access doors on industrial equipment. Built in a 22 mm (M22) form factor, this MT-GD2 interlock uses a tongue-style actuator to sense door position and provides two normally closed safety contacts plus two normally open auxiliary contacts, enabling a monitored safety path for primary shutdown and additional signaling or control circuits. The M22 variant is part of the 440K Series, a family of tongue-interlock switches widely used to secure guarding enclosures on presses, conveyors, and other high-risk machinery. This model is intended to be wired to a safety relay or safety PLC so that loss of door closure or an interlock fault interrupts machine power, protecting personnel during operation. With its Guardmaster design, the 440K-M22AEYT supports standard interlock configurations for 22 mm guards and pairs with MT-GD2 actuators and guards in typical manufacturing environments where consistent, reliable door monitoring is required.